Water-based dehydrating agent for nickel-plated aluminum workpiece, working solution, preparation method of water-based dehydrating agent and working solution and dehydrating method of nickel-plated aluminum workpiece

Abstract

The invention belongs to the technical field of dehydrating agents, and particularly relates to a water-based dehydrating agent for an aluminum nickel-plated workpiece, a working solution, a preparation method and a dehydrating method of the aluminum nickel-plated workpiece. In the water-based dehydrating agent for the nickel-plated aluminum workpiece provided by the invention, a dehydrating surfactant ethanediamine oleate, a dehydrating promoting and corrosion inhibitor fatty acid polyethylene glycol ether phosphate, a wetting agent alkynol and derivatives thereof, a cosolvent alcohol ether, a pH regulator organic alkali and a solvent water are matched with one another; under the specific action of ingredients such as ethylenediamine oleate, fatty acid polyethylene glycol ether phosphate, wetting agent alkynol and derivatives thereof, the water-based dehydrating agent can effectively promote water to be curled into drops to be separated from the surface and exert a corrosion inhibition effect, and direct dehydration can be realized without water washing; and the water-based dehydrating agent is suitable for dehydrating the aluminum nickel-plated workpiece with a complex shape, is a high-performance water-based dehydrating agent for the aluminum nickel-plated workpiece, and solves the technical problem of poor performance of the water-based dehydrating agent for the aluminum nickel-plated workpiece in the prior art.

Description

TECHNICAL FIELD

[0001] The application belongs to the technical field of dehydrating agent, and particularly relates to a water-based dehydrating agent for aluminum-nickel-plated workpieces, a working solution, a preparation method and a dehydrating method for aluminum-nickel-plated workpieces. BACKGROUND

[0002] The aluminum-nickel-plated workpiece is a technology of depositing nickel on the surface of aluminum or aluminum alloy through electroplating process, and the core purpose is to combine the light weight and high thermal conductivity of aluminum with the corrosion resistance, decoration and functionality of the nickel plating layer, make up for the performance defects of aluminum itself, endow the aluminum piece with corrosion resistance, wear resistance, beauty, electrical conductivity and other characteristics, so that it can adapt to more severe working conditions and be widely used in the fields of automobile, electronics, aerospace, decoration and the like; after electroplating, the aluminum-nickel-plated workpiece usually needs to remove the electroplating solution remaining on the surface of the aluminum-nickel-plated workpiece to prevent the plating layer from being corroded or affecting the next process.

[0003] Water washing can cause water to uniformly cover the metal surface, and if not removed in time, it can cause watermarks, spots and other stains to be difficult to remove on the surface of the aluminum-nickel-plated workpiece, and even cause problems such as corrosion of the aluminum base and blackening of the nickel layer. Natural air drying or heating drying can accelerate the drying of water, but the production efficiency is low and the effect is poor, which is not suitable for mass production. At present, the commonly used method in production is to use a dehydrating agent for treatment; the aluminum-nickel-plated dehydrating agent is generally composed of a surfactant, an inhibitor, a cosolvent and a pH adjuster, etc., and is a kind of dehydrating agent which not only can form a hydrophobic film on the surface of the aluminum-nickel-plated workpiece to achieve rapid dehydration, but also can fill the micropores of the nickel plating layer of the aluminum-nickel-plated workpiece to improve the corrosion resistance of the aluminum-nickel-plated workpiece and provide short-term protection; the dehydrating agent mainly has two types of solvent type and water-based type. The solvent type dehydrating agent usually contains ethylene glycol monobutyl ether, isopropyl alcohol and other components, and has a very high content of volatile organic compounds, which not only harms human health, but also has the risk of flammability. While the water-based dehydrating agent has the problems of being difficult to wet the complex positions such as blind holes and threads on the surface of the aluminum-nickel-plated workpiece, and the water-based dehydrating agent is usually poor in corrosion inhibition for the aluminum-nickel-plated workpiece compared with the solvent type dehydrating agent. In addition, the conventional process for dehydrating the aluminum-nickel-plated workpiece by using the water-based dehydrating agent is immersion in the water-based dehydrating agent and water washing, and the dehydration process is relatively complex. These reasons make the performance of the current water-based dehydrating agent poor. SUMMARY

[0004] Therefore, the application provides a water-based dehydrating agent for aluminum-nickel-plated workpieces, a working solution, a preparation method and a dehydrating method for aluminum-nickel-plated workpieces to solve the technical problem of poor performance of the water-based dehydrating agent for aluminum-nickel-plated workpieces in the prior art.

[0005] The first aspect of the application provides a water-based dehydrating agent for aluminum-nickel-plated workpieces, which comprises a dehydrating surfactant ethylenediamine oleate, a dehydrating promoting and corrosion inhibitor fatty acid polyethylene glycol ether phosphate, a wetting agent acetylenic alcohol and its derivatives, a cosolvent alcohol ether, a pH adjuster organic base and a solvent water;

[0006] The mass percentage of the dewatering surfactant ethylenediamine oleate in the water-based dewatering agent for aluminum-nickel-plated workpieces is higher than 4wt%, and the mass percentage of the dewatering-promoting and corrosion-inhibiting agent fatty acid polyglycol ether phosphate ester is higher than 0.5wt%.

[0007] Preferably, the mass percentage of the dewatering surfactant ethylenediamine oleate in the water-based dewatering agent for aluminum-nickel-plated workpieces is not less than 5wt%, and the mass percentage of the dewatering-promoting and corrosion-inhibiting agent fatty acid polyglycol ether phosphate ester is not less than 1wt%.

[0008] Preferably, the mass percentage of the dewatering surfactant ethylenediamine oleate in the water-based dewatering agent for aluminum-nickel-plated workpieces is 6~10wt%, and the mass percentage of the dewatering-promoting and corrosion-inhibiting agent fatty acid polyglycol ether phosphate ester is 2~4wt%.

[0009] Preferably, the wetting agent acetylenic alcohol and its derivatives are selected from at least one of acetylenic diol, acetylenic diol monoethoxy ether, diethyl hexyne diol, tetramethyl decyne diol, and polyether-modified acetylenic diol.

[0010] Preferably, the co-solvent alcohol ether is selected from at least one of propylene glycol methyl ether, propylene glycol ethyl ether, propylene glycol butyl ether, ethylene glycol methyl ether, ethylene glycol ethyl ether, and ethylene glycol butyl ether.

[0011] Preferably, the pH regulator organic base is selected from at least one of triethanolamine, diethanolamine, ethanolamine, and N-methyl diethanolamine.

[0012] Preferably, in the water-based dewatering agent for aluminum-nickel-plated workpieces, the mass percentage of the dewatering surfactant ethylenediamine oleate is 6~10wt%, the mass percentage of the dewatering-promoting and corrosion-inhibiting agent fatty acid polyglycol ether phosphate ester is 2~4wt%, the mass percentage of the wetting agent acetylenic alcohol and its derivatives is 0.05~0.1wt%, the mass percentage of the co-solvent alcohol ether is 2~5wt%, the mass percentage of the pH regulator organic base is 0.5~2wt%, and the mass percentage of the solvent water is 78.9~89.45wt%.

[0013] The second aspect of the present application provides a preparation method of a water-based dewatering agent for aluminum-nickel-plated workpieces, which can prepare the water-based dewatering agent for aluminum-nickel-plated workpieces of the first aspect, and the preparation method comprises: uniformly mixing dewatering surfactant ethylenediamine oleate, dewatering-promoting and corrosion-inhibiting agent fatty acid polyglycol ether phosphate ester, wetting agent acetylenic alcohol and its derivatives, co-solvent alcohol ether, pH regulator organic base, and solvent water to obtain the water-based dewatering agent for aluminum-nickel-plated workpieces.

[0014] The third aspect of the present application provides a working fluid, which comprises 1~10 mass parts of the water-based dewatering agent for aluminum-nickel-plated workpieces of the first aspect and 90~99 mass parts of water.

[0015] The fourth aspect of the present application provides a dehydration method of an aluminum-nickel-plated workpiece, comprising the following steps:

[0016] The aluminum-nickel-plated workpiece is soaked in the aluminum-nickel-plated workpiece water-based dehydrating agent of the first aspect or the working liquid of the third aspect, and then taken out for dehydration.

[0017] Preferably, the aluminum-nickel-plated workpiece is selected from at least one of the following: an aluminum-nickel-plated lamp holder, an aluminum-nickel-plated door handle, an aluminum-nickel-plated valve core, an aluminum-nickel-plated USB interface, and an aluminum-nickel-plated housing of a consumer electronic product.

[0018] Compared with the prior art, the aluminum-nickel-plated workpiece water-based dehydrating agent provided by the present application has at least the following beneficial effects:

[0019] 1. In the aluminum-nickel-plated workpiece water-based dehydrating agent provided by the present application, the dehydration surfactant ethylenediamine oleate, the dehydration promoting and corrosion inhibitor fatty acid polyethylene glycol ether phosphate, the wetting agent acetylenic alcohol and its derivatives, the cosolvent alcohol ether, the pH adjuster organic base, and the solvent water cooperate with each other, and by adding sufficient amount of the dehydration surfactant ethylenediamine oleate and the dehydration promoting and corrosion inhibitor fatty acid polyethylene glycol ether phosphate, the aluminum-nickel-plated workpiece surface is combined through coordination / electrostatic adsorption and other methods, the continuity of the water film is destroyed, the water droplets are effectively promoted to roll up and separate from the surface, and the corrosion inhibition effect is exerted, so that direct dehydration without water washing can be achieved.

[0020] 2. In the aluminum-nickel-plated workpiece water-based dehydrating agent provided by the present application, the dehydration surfactant ethylenediamine oleate, the dehydration promoting and corrosion inhibitor fatty acid polyethylene glycol ether phosphate, the wetting agent acetylenic alcohol and its derivatives, the cosolvent alcohol ether, the pH adjuster organic base, and the solvent water cooperate with each other, and by adding the wetting agent acetylenic alcohol and its derivatives, the water-based dehydrating agent can fully wet the thread gap of the aluminum-nickel-plated lamp, and is suitable for dehydration treatment of aluminum-nickel-plated workpieces with complex shapes.

[0021] 3. The aluminum-nickel-plated workpiece water-based dehydrating agent provided by the present application is composed of the dehydration surfactant ethylenediamine oleate, the dehydration promoting and corrosion inhibitor fatty acid polyethylene glycol ether phosphate, the wetting agent acetylenic alcohol and its derivatives, the cosolvent alcohol ether, the pH adjuster organic base, and the solvent water, and is a water-based formula, non-flammable and non-explosive, safe and environmentally friendly. BRIEF DESCRIPTION OF DRAWINGS

[0022] In order to more clearly illustrate the technical solutions in the specific embodiments or the prior art of the present application, the drawings needed in the following specific embodiment or prior art description will be briefly introduced. Obviously, the drawings in the following description are some embodiments of the present application, and other drawings can also be obtained by those skilled in the art without creative labor.

[0023] Figure 1A preparation method flowchart of an aluminum-nickel-plated workpiece water-based dewatering agent is provided for the embodiments 1-3 of the present application. DETAILED DESCRIPTION

[0024] The present application provides an aluminum-nickel-plated workpiece water-based dewatering agent, a working solution, a preparation method and a dewatering method for aluminum-nickel-plated workpieces, which are used to solve the technical problem of poor performance of the aluminum-nickel-plated workpiece water-based dewatering agent in the prior art.

[0025] The technical solutions of the present application will be clearly and completely described below with reference to the drawings. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of protection of the present application.

[0026] Embodiment 1

[0027] The present embodiment provides a preparation method of an aluminum-nickel-plated workpiece water-based dewatering agent, and a preparation method flowchart is shown as Figure 1 The preparation method includes the following steps:

[0028] The step of weighing raw materials: 6g of ethylenediamine oleate, 3g of fatty acid polyethylene glycol ether-based phosphate, 0.1g of acetylenic diol, 3g of propylene glycol methyl ether, 1g of triethanolamine and 86.9g of solvent water are weighed respectively.

[0029] The step of configuring the dewatering agent: the weighed ethylenediamine oleate, fatty acid polyethylene glycol ether-based phosphate, acetylenic diol, propylene glycol methyl ether, triethanolamine and solvent water are added to a beaker and stirred and mixed uniformly by a magnetic stirrer to configure the aluminum-nickel-plated workpiece water-based dewatering agent, which is ready for use.

[0030] Embodiment 2

[0031] The present embodiment provides a preparation method of an aluminum-nickel-plated workpiece water-based dewatering agent, and a preparation method flowchart is shown as Figure 1 The preparation method includes the following steps:

[0032] The step of weighing raw materials: 8g of ethylenediamine oleate, 3g of fatty acid polyethylene glycol ether-based phosphate, 0.1g of acetylenic diol, 3g of propylene glycol methyl ether, 1g of triethanolamine and 84.9g of solvent water are weighed respectively.

[0033] The step of configuring the dewatering agent: the weighed ethylenediamine oleate, fatty acid polyethylene glycol ether-based phosphate, acetylenic diol, propylene glycol methyl ether, triethanolamine and solvent water are added to a beaker and stirred and mixed uniformly by a magnetic stirrer to configure the aluminum-nickel-plated workpiece water-based dewatering agent, which is ready for use.

[0034] Embodiment 3

[0035] The embodiment provides a preparation method of a water-based dehydrating agent for an aluminum-nickel-plated workpiece, a flowchart is shown in the figure Figure 1 The preparation method comprises the following steps:

[0036] The step of weighing raw materials comprises the following steps: respectively weighing 6g of ethylenediamine oleate, 2g of fatty acid polyglycol ether phosphate, 0g of acetylenic diol, 3g of propylene glycol methyl ether, 1g of triethanolamine and 87.9g of solvent water.

[0037] The step of configuring the dehydrating agent comprises the following steps: adding the weighed ethylenediamine oleate, fatty acid polyglycol ether phosphate, acetylenic diol, propylene glycol methyl ether, triethanolamine and solvent water into a beaker, and stirring and uniformly mixing the mixture by using a magnetic stirrer, so that the water-based dehydrating agent for the aluminum-nickel-plated workpiece is configured and reserved.

[0038] Embodiment 4

[0039] The embodiment provides a preparation method of a water-based dehydrating agent for an aluminum-nickel-plated workpiece, which is taken as a first comparative example, and the preparation method comprises the following steps:

[0040] The step of weighing raw materials comprises the following steps: respectively weighing 4g of ethylenediamine oleate, 3g of fatty acid polyglycol ether phosphate, 0.1g of acetylenic diol, 3g of propylene glycol methyl ether, 1g of triethanolamine and 88.9g of solvent water.

[0041] The step of configuring the dehydrating agent comprises the following steps: adding the weighed ethylenediamine oleate, fatty acid polyglycol ether phosphate, acetylenic diol, propylene glycol methyl ether, triethanolamine and solvent water into a beaker, and stirring and uniformly mixing the mixture by using a magnetic stirrer, so that the water-based dehydrating agent for the aluminum-nickel-plated workpiece is configured and reserved.

[0042] Embodiment 5

[0043] The embodiment provides a preparation method of a water-based dehydrating agent for an aluminum-nickel-plated workpiece, which is taken as a second comparative example, and the preparation method comprises the following steps:

[0044] The step of weighing raw materials comprises the following steps: respectively weighing 8g of ethylenediamine oleate, 0.5g of fatty acid polyglycol ether phosphate, 0.1g of acetylenic diol, 3g of propylene glycol methyl ether, 1g of triethanolamine and 87.4g of solvent water.

[0045] The step of configuring the dehydrating agent comprises the following steps: adding the weighed ethylenediamine oleate, fatty acid polyglycol ether phosphate, acetylenic diol, propylene glycol methyl ether, triethanolamine and solvent water into a beaker, and stirring and uniformly mixing the mixture by using a magnetic stirrer, so that the water-based dehydrating agent for the aluminum-nickel-plated workpiece is configured and reserved.

[0046] Embodiment 6

[0047] The embodiment provides a preparation method of a water-based dehydrating agent for an aluminum-nickel-plated workpiece, and the preparation method comprises the following steps:

[0048] The step of weighing raw materials comprises the following steps: respectively weighing 8 g of ethylenediamine oleate, 3 g of fatty acid polyglycol ether phosphate, 3 g of propylene glycol methyl ether, 1 g of triethanolamine and 85 g of solvent water.

[0049] The step of configuring the dehydrating agent comprises the following steps: adding the weighed ethylenediamine oleate, fatty acid polyglycol ether phosphate, propylene glycol methyl ether, triethanolamine and solvent water into a beaker, and stirring and uniformly mixing the dehydrating agent by using a magnetic stirrer, so that the water-based dehydrating agent for the aluminum-nickel-plated workpiece is configured, and the water-based dehydrating agent is prepared.

[0050] Experimental example 1

[0051] The water-based dehydrating agent for the aluminum-nickel-plated workpiece provided in the embodiment 1-6 and the commercially available aluminum-nickel-plated electroplating dehydrating agent are subjected to performance testing, and the performance testing comprises dehydrating performance and corrosion resistance performance testing, and the testing results are shown in Table 1.

[0052] The process of the dehydrating performance testing comprises the following steps:

[0053] The water-based dehydrating agent for the aluminum-nickel-plated workpiece provided in the embodiment 1-6 and the commercially available aluminum-nickel-plated electroplating dehydrating agent are configured into 5% working solutions of the embodiment 1-6 and the commercially available aluminum-nickel-plated electroplating dehydrating agent by using water;

[0054] The aluminum-nickel-plated lamp holder just after electroplating is pre-cleaned by using a cleaning agent / tap water / deionized water;

[0055] The aluminum-nickel-plated lamp holder is respectively placed in the working solutions of the embodiment 1-6 and the commercially available aluminum-nickel-plated electroplating dehydrating agent for 1 minute, and then slowly taken out, and the dehydrating conditions of the surface of the aluminum-nickel-plated lamp holder are observed and recorded;

[0056] The aluminum-nickel-plated lamp holder is slowly immersed in distilled water for 1 minute, and then slowly taken out, and the dehydrating conditions of the surface of the aluminum-nickel-plated lamp holder are observed and recorded.

[0057] The corrosion resistance performance testing is used for quickly observing the effect, and a 7075 aluminum alloy workpiece is used, and the corrosion resistance performance testing comprises the following steps:

[0058] The water-based dehydrating agent for the aluminum-nickel-plated workpiece provided in the embodiment 1-6 is configured into a working solution of the embodiment 1-6 by using water;

[0059] The 7075 aluminum alloy workpiece is respectively placed in the working solutions of the embodiment 1-6 and the commercially available aluminum-nickel-plated electroplating dehydrating agent for 1 minute, and then slowly taken out, and the temperature is controlled at about 55 DEG C, and the corrosion of the test piece is observed for 8 hours.

[0060] Table 1: Dehydrating performance and corrosion resistance performance testing results

[0061]

[0062] As can be seen from Table 1, the water-based dewatering agent for the aluminum-nickel-plated workpiece provided in Example 4 has poor dewatering performance, and water-based dewatering immersion and water washing still have water residues. This is because the amount of dewatering surfactant ethylenediamine oleate is small, and the hydrophobic end of ethylenediamine oleate is difficult to form a dense hydrophobic layer, resulting in poor dewatering performance. In the water-based dewatering agent for the aluminum-nickel-plated workpiece provided in Example 5, the amount of dewatering promoter and corrosion inhibitor fatty acid polyglycol ether phosphate ester is small, and water washing is still needed for dewatering. The dewatering performance is poor and the corrosion inhibition effect is poor, resulting in corrosion of the 7075 aluminum alloy workpiece, indicating that it is difficult to fill the micropores of the nickel plating layer of the aluminum-nickel-plated workpiece for corrosion inhibition. Compared with Examples 4-5, the water-based dewatering agents for the aluminum-nickel-plated workpiece provided in Examples 1-3 all have good dewatering and corrosion inhibition effects. This is because the amounts of ethylenediamine oleate and fatty acid polyglycol ether phosphate ester in the water-based dewatering agents for the aluminum-nickel-plated workpiece provided in Examples 1-3 are sufficient. The hydrophilic end of ethylenediamine in ethylenediamine oleate can be anchored to the aluminum-nickel-plated workpiece as a bidentate ligand by coordinating with the residual nickel ions on the surface of the nickel plating layer of the aluminum-nickel-plated workpiece. The hydrophobic end of the long-chain alkyl group forms a dense hydrophobic film, preventing water from spreading and adhering to the metal surface and improving the dewatering effect. The hydrophilic end of the phosphate ester group in the fatty acid polyglycol ether phosphate ester can combine with the residual nickel ions on the surface of the nickel plating layer of the aluminum-nickel-plated workpiece through electrostatic adsorption. In addition, due to the sufficient amount of fatty acid polyglycol ether phosphate ester, it cooperates with ethylenediamine oleate to destroy the continuity of the water film, effectively promoting the curling of water droplets into drops and detaching from the surface, and exerting a corrosion inhibition effect, which can directly dewater without water washing.

[0063] As can be seen from Table 1, compared with the water-based dewatering agent for the aluminum-nickel-plated workpiece provided in Examples 1-3, the dewatering effect of the water-based dewatering agent for the aluminum-nickel-plated workpiece provided in Example 6 has decreased. This is because the aluminum-nickel-plated lamp holder has a complex thread, and the water-based dewatering agent for the aluminum-nickel-plated workpiece provided in Example 6 is difficult to fully wet the thread gap, resulting in a decrease in the dewatering effect, and a small amount of water marks and spots appear on the workpiece. The commercially available aluminum-nickel-plated electroplating dewatering agent is currently the mainstream water-based dewatering agent, which needs water-based dewatering agent immersion and water washing, and the steps are relatively complex.

[0064] The above examples are only used to illustrate the technical solutions of the present application, but not to limit them. Although the present application has been described in detail with reference to the foregoing examples, those skilled in the art should understand that they can still modify the technical solutions described in the foregoing examples, or make equivalent replacements for part or all of the technical features. Such modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the embodiments of the present application.

Claims

1. A water-based dehydrator for aluminum-plated nickel workpieces, characterized in that, dehydration surfactant ethylenediamine oleate, dehydration promoting and corrosion inhibitor fatty acid polyglycol ether phosphonate, wetting agent acetylenic alcohol and its derivatives, cosolvent alcohol ether, pH regulator organic base, and solvent water; The mass percentage of the dehydration surfactant ethylenediamine oleate in the water-based dehydration agent for the aluminum-nickel-plated workpiece is higher than 4 wt%, and the mass percentage of the dehydration promoting and corrosion inhibitor fatty acid polyglycol ether phosphonate is higher than 0.5 wt%.

2. The aqueous dehydrator for nickel-coated aluminum workpieces according to claim 1, characterized in that, The mass percentage of the dehydration surfactant ethylenediamine oleate in the water-based dehydration agent for the aluminum-nickel-plated workpiece is not less than 5 wt%, and the mass percentage of the dehydration promoting and corrosion inhibitor fatty acid polyglycol ether phosphonate is not less than 1 wt%.

3. The aqueous dehydrator for nickel-coated aluminum workpieces according to claim 1, characterized in that, The mass percentage of the dehydration surfactant ethylenediamine oleate in the water-based dehydration agent for the aluminum-nickel-plated workpiece is 6-10 wt%, and the mass percentage of the dehydration promoting and corrosion inhibitor fatty acid polyglycol ether phosphonate is 2-4 wt%.

4. The aqueous dehydrator for nickel-coated aluminum workpieces according to claim 1, characterized in that, The wetting agent acetylenic alcohol and its derivatives are selected from at least one of acetylenic diol, acetylenic diol monoethoxyl ether, diethylhexyne diol, tetramethyl decyne diol, and polyether modified acetylenic diol.

5. The aqueous dehydrator for nickel-coated aluminum workpieces according to claim 1, characterized in that, The cosolvent alcohol ether is selected from at least one of propylene glycol methyl ether, propylene glycol ethyl ether, propylene glycol butyl ether, ethylene glycol methyl ether, ethylene glycol ethyl ether, and ethylene glycol butyl ether.

6. The aqueous dehydrator for nickel-coated aluminum workpieces according to claim 1, characterized in that, The pH regulator organic base is selected from at least one of triethanolamine, diethanolamine, ethanolamine, and N-methyl diethanolamine.

7. The aqueous dehydrator for nickel-coated aluminum workpieces according to claim 1, characterized in that, In the water-based dehydration agent for the aluminum-nickel-plated workpiece, the dehydration surfactant ethylenediamine oleate accounts for 6-10 wt%, the dehydration promoting and corrosion inhibitor fatty acid polyglycol ether phosphonate accounts for 2-4 wt%, the wetting agent acetylenic alcohol and its derivatives account for 0.05-0.1 wt%, the cosolvent alcohol ether accounts for 2-5 wt%, the pH regulator organic base accounts for 0.5-2 wt%, and the solvent water accounts for 78.9-89.45 wt%.

8. A method for preparing a water-based dehydrator for aluminum-plated nickel workpieces, characterized in that, A water-based dehydration agent for an aluminum-nickel-plated workpiece is prepared by mixing the dehydration surfactant ethylenediamine oleate, the dehydration promoting and corrosion inhibitor fatty acid polyglycol ether phosphonate, the wetting agent acetylenic alcohol and its derivatives, the cosolvent alcohol ether, the pH regulator organic base, and the solvent water uniformly.

9. A working fluid, characterized by, The water-based dehydration agent for the aluminum-nickel-plated workpiece is prepared by mixing 1-10 parts by mass of the water-based dehydration agent for the aluminum-nickel-plated workpiece and 90-99 parts by mass of water.

10. A method of dehydrating a nickel-coated aluminum workpiece, comprising: The method comprises the following steps: The aluminum-nickel-plated workpiece is immersed in the water-based dehydration agent for the aluminum-nickel-plated workpiece or the working solution of the third aspect, and then is taken out for dehydration.

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